21220222112001 has 24 divisors (see below), whose sum is σ = 33895979541216. Its totient is φ = 12684566139840.

The previous prime is 21220222111961. The next prime is 21220222112039. The reversal of 21220222112001 is 10021122202212.

It is a happy number.

21220222112001 is a `hidden beast` number, since 21 + 220 + 2 + 221 + 1 + 200 + 1 = 666.

It is not a de Polignac number, because 21220222112001 - 2⁶ = 21220222111937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220222112041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1468113855 + ... + 1468128308.

It is an arithmetic number, because the mean of its divisors is an integer number (1412332480884).

Almost surely, 2^{21220222112001} is an apocalyptic number.

It is an amenable number.

21220222112001 is a deficient number, since it is larger than the sum of its proper divisors (12675757429215).

21220222112001 is a wasteful number, since it uses less digits than its factorization.

21220222112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936242253 (or 2936242250 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220222112001 its reverse (10021122202212), we get a palindrome (31241344314213).

The spelling of 21220222112001 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twelve thousand, one".